Carlos Dagorret <[email protected]> writes: > I ran into this exact issue when exporting a document with a complex > MathJax formula, and applying your fix solved the stack overflow for me. > ... > It worked fine in my specific test, but I think we need to keep the > full `<math>...</math>` wrapper because OpenDocument / LibreOffice needs > those tags to know where the MathML object actually starts and ends. > Without them, it might fail to render as a proper formula in other cases. > > To keep the tags (just like the original code did), we could use > `(match-beginning 0)` like this: > > (when (re-search-forward > (format "<math[^>]*?%s[^>]*?>" > (regexp-quote "xmlns=\"http://www.w3.org/1998/Math/MathML\"";)) > nil t) > (let ((from (match-beginning 0))) > (when (re-search-forward "</math>" nil t) > (buffer-substring from (match-end 0)))))
What about simply using non-greedy version of the original regexp? I cannot test it myself since I do not have a reproducer.
>From 8fedad0965fddf79b1288a989dc4e56630bdf3fe Mon Sep 17 00:00:00 2001 Message-ID: <8fedad0965fddf79b1288a989dc4e56630bdf3fe.1788618959.git.yanta...@posteo.net> From: Ihor Radchenko <[email protected]> Date: Sat, 5 Sep 2026 16:34:44 +0200 Subject: [PATCH] org-create-math-formula: Fix stack overflow in regexp * lisp/org.el (org-create-math-formula): Use non-greedy regexp to match <math...>...</math> text. Reported-by: Mykhailo Mishchenko <[email protected]> Link: https://orgmode.org/list/75ZIj4KgLDc5DlcK8LET1LZ9Bcx9U_Fc9BaWygoePseLUWzWLPabKSlETnsVMhT9GflfDzEPSqFdqHT_shUCqZ7BXjBKA-IiCqV6qfXYOfY=@protonmail.com --- lisp/org.el | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lisp/org.el b/lisp/org.el index e07cfb337..c8bc28ea6 100644 --- a/lisp/org.el +++ b/lisp/org.el @@ -16915,7 +16915,7 @@ (defun org-create-math-formula (latex-frag &optional mathml-file) (insert-file-contents tmp-out-file) (goto-char (point-min)) (when (re-search-forward - (format "<math[^>]*?%s[^>]*?>\\(.\\|\n\\)*</math>" + (format "<math[^>]*?%s[^>]*?>\\(.\\|\n\\)*?</math>" (regexp-quote "xmlns=\"http://www.w3.org/1998/Math/MathML\"";)) nil t) -- 2.54.0
-- Ihor Radchenko // yantar92, Org mode maintainer, Learn more about Org mode at <https://orgmode.org/>. Support Org development at <https://liberapay.com/org-mode>, or support my work at <https://liberapay.com/yantar92>
